← Bolts
MS20007-64
MS20007 internal wrenching bolt, 160 ksi Ftu (MS20004 THRU MS20024)
| Head / form | Internal wrenching (hex socket) head |
|---|---|
| Diameter / thread / size | 7/16-20 UNJF-3A, shank (A dia) .4367-.4347" |
| Grip / length / thickness | grip 4.000" (±.010), length 4.812" (±.015) (MS20004E THRU 20024E page 3, Table II) |
| Material / finish | Alloy steel (UNS G43400, G43406, G41400, G87400, G87350) |
| Reference confidence | high |
| Source | MS20004E THRU 20024E (1989-05-30, Distribution A), pages 1 to 4 ↗ |
Head / form source: MS20004E THRU 20024E page 1 (figure)
Source notes and limits
- No H: undrilled head (page 4 example MS20017-18 "UNDRILLED HEAD").
- Tensile strength 20,600 lb min (MS20004E THRU 20024E page 2, Table I continued).
- Material: ALLOY STEEL - UNS G43400, UNS G43406, UNS G41400, UNS G87400, UNS G87350; finish: cadmium plating per QQ-P-416, Type II, Class 2; hardness 34-40 HRC (page 1 requirements).
- MS20004 THRU 20024E, dated 30 MAY 1989, is hereby canceled and superseded by NASM20004 THRU 20024. The Part Identification Number (PIN) for MS20004 THRU 20024E and the part number for NASM20004 THRU 20024 are identical. The part numbers have not been changed. (MS20004 THRU 20024E Notice 1)
- FAA AC 43.13-1B para 7-46 (page 7-10): "INTERNAL WRENCHING BOLTS (MS20004 THROUGH MS20024) ... The NAS144 through NAS158 and NAS172 through NAS176 are interchangeable with MS20004 through MS20024 in the same thread configuration and grip lengths."
Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers