Threaded inserts (key-locked MS51830 / Keenserts, helical coil MS21209) tooling, gauges and removal
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Tools, heads, adapters and gaugesCited tables
Published tool combinations
- Dia.Tool + nose / headAccessNotes and source
- MS51830-101 (8-32 external)LDS-02Standard · handAlternate as printed: TKNC-02*.Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-102 (10-32 external)LDS-04Standard · handAlternate as printed: TKNC-04*.Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-103 (12-28 external)LDS-06Standard · handAlternate as printed: TKNC-06*.Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-104 (1/4-28 external)LDS-08Standard · handAlternate as printed: TKNC-08*.Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-105 / MS51830-201 (5/16-18 external)LDS-3Standard · handAlternate as printed: TD1024L* (-105), TD1032L* (-201).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-106 / MS51830-202 (3/8-16 external)LDS-4Standard · handAlternate as printed: TD420L* (-106), TD428L* (-202).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-107 / MS51830-203 (7/16-14 external)LDS-5Standard · handAlternate as printed: TD518L* (-107), TD524L* (-203).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-108 / MS51830-204 (1/2-13 external)LDS-6Standard · handAlternate as printed: TD616L* (-108), TD624L* (-204).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-109 / MS51830-205 (9/16-12 external)LDS-7Standard · handAlternate as printed: TD714L* (-109), TD720L* (-205).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
- MS51830-110 / MS51830-206 (5/8-11 external)LDS-8Standard · handAlternate as printed: TD813L* (-110), TD820L* (-206).Howmet Keysert and Keensert catalog, p.11, Miniature and Lightweight Keenserts, Installation and Removal columns ↗
Installation tools
LDS-02
Keensert installation tool for MS51830-101 (8-32 external thread)
hand
Alternate installation tool as printed: TKNC-02*. Removal drill size: #33 (.113). "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-04
Keensert installation tool for MS51830-102 (10-32 external thread)
hand
Alternate installation tool as printed: TKNC-04*. Removal drill size: #29 (.136). "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-06
Keensert installation tool for MS51830-103 (12-28 external thread)
hand
Alternate installation tool as printed: TKNC-06*. Removal drill size: #21 (.159). "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-08
Keensert installation tool for MS51830-104 (1/4-28 external thread)
hand
Alternate installation tool as printed: TKNC-08*. Removal drill size: #8 (.199). "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-3
Keensert installation tool for MS51830-105 / MS51830-201 (5/16-18 external thread)
hand
Alternate installation tool as printed: TD1024L* (-105), TD1032L* (-201). Removal drill size: 7/32. "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-4
Keensert installation tool for MS51830-106 / MS51830-202 (3/8-16 external thread)
hand
Alternate installation tool as printed: TD420L* (-106), TD428L* (-202). Removal drill size: 9/32. "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-5
Keensert installation tool for MS51830-107 / MS51830-203 (7/16-14 external thread)
hand
Alternate installation tool as printed: TD518L* (-107), TD524L* (-203). Removal drill size: 11/32. "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-6
Keensert installation tool for MS51830-108 / MS51830-204 (1/2-13 external thread)
hand
Alternate installation tool as printed: TD616L* (-108), TD624L* (-204). Removal drill size: 13/32. "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-7
Keensert installation tool for MS51830-109 / MS51830-205 (9/16-12 external thread)
hand
Alternate installation tool as printed: TD714L* (-109), TD720L* (-205). Removal drill size: 15/32. "* Indicates minimum activity-limited availability. Minimums may apply."
LDS-8
Keensert installation tool for MS51830-110 / MS51830-206 (5/8-11 external thread)
hand
Alternate installation tool as printed: TD813L* (-110), TD820L* (-206). Removal drill size: 17/32. "* Indicates minimum activity-limited availability. Minimums may apply."
Style A prewinder tool
Prewinder inserting tool (helical coil)
hand
"Style A prewinder tools shall consist of a mandrel and prewinder ... The end of the mandrel shall be capable of engaging the driving tang of the insert for driving the insert into the tapped hole."
A-A-59158 (helical coil insert tools), p.8 (PDF), §3.9.1.1 ↗
Accessorys
B332-4
Broaching tool (key slots), the document's example code
"Broaching Tools are coded in the following manner: B 332 -4": B, the recommended installation tap-drill diameter, then the number of locking KEES. "The smallest tap drill diameter for which broaching tools can be made is .213."
Howmet Keenserts Installation, Removal & Broach, p.2, Broaching Tool ↗
STI tap
Screw thread insert tap (helical coil)
"All taps shall be marked either "screw thread insert" or "STI"" (A-A-59158 §3.7). "Helical coil STI taps are available in both Class 2B and Class 3B fits." (PRC-9008 §3.1)
Type IV tang break-off tool
Tang break-off tool (helical coil)
"The Class 1, Style A tang break-off tool for sizes 1/4 (.250) inch and smaller shall be of the automatic punch type consisting of a spring actuated punch and appropriate sleeve assembly."
A-A-59158 (helical coil insert tools), p.14 (PDF), §3.10.1 ↗
Type V extracting tool
Extracting tool (helical coil)
"The Type V extracting tool shall consist of a round shaft, tapered blade and a handle" (A-A-59158 §3.11).
Tooling source notes
- "Tanged inserts and tangless inserts require different installation tooling and shall not be supplied interchangeably." (MIL-I-8846D §6.3.1)Government document, not interview: MIL-I-8846D.
Removal (drill-out)Published procedure
Howmet Keenserts Installation, Removal & Broach, Insert Removal (key-locked)
- “Use standard drill, as listed for each part number to remove insert material between KEES.” Howmet Keenserts Installation, Removal & Broach, p.2, Insert Removal ↗
- “Deflect KEES inward and break off.” Howmet Keenserts Installation, Removal & Broach, p.2, Insert Removal ↗
- “Remove insert with E-Z OUT type tool.” Howmet Keenserts Installation, Removal & Broach, p.2, Insert Removal ↗
- “An identical insert can now be installed in the original hole. No re-work of the hole will be necessary.” Howmet Keenserts Installation, Removal & Broach, p.2, Insert Removal ↗
Removal drill size per insert (Howmet catalog p.11, Removal columns)
| MS51830 dash | Drill size |
|---|---|
| -101 | #33 (.113) |
| -102 | #29 (.136) |
| -103 | #21 (.159) |
| -104 | #8 (.199) |
| -105 / -201 | 7/32 |
| -106 / -202 | 9/32 |
| -107 / -203 | 11/32 |
| -108 / -204 | 13/32 |
| -109 / -205 | 15/32 |
| -110 / -206 | 17/32 |
Howmet Keysert and Keensert catalog, p.11, Removal, Drill Size ↗
Also published: NASA PRC-9008 Rev E §6.3 (helical coil)
- “The manufacturer's tooling shall be used to back out the discrepant helical insert.” NASA PRC-9008 Rev E (helical coil insert installation), p.8, §6.3 Removal or Replacement ↗
- “The hole shall be re-inspected per section 6.2 before a new helical insert is installed.” NASA PRC-9008 Rev E (helical coil insert installation), p.8, §6.3 Removal or Replacement ↗
Cautions
- “Helical inserts shall not be reinstalled.” NASA PRC-9008 Rev E (helical coil insert installation), p.8, §6.3 Removal or Replacement ↗
None of the removal procedures on file gives a composite-specific removal caution. The Monogram specs address composite at the hole instead: holes "reasonably round and free from burrs (metallic structure) and delamination (graphite/epoxy type structure)" (MBF2003 §5.1).
Sources
Tool tables are the manufacturer's as published in the cited revision; confirm current tool PNs with the manufacturer before purchase. Not a certified process authority: install and remove per the OEM process specification.
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