Visu-Lok, Monogram
PLT5170-06-09
Visu-Lok II: "high strength blind bolt for use in metallic structures" (Monogram catalog).
- Head Flush head (100° flush head series)
- Diameter 3/16" (-6)
- Grip .532-.594"
- Material Titanium (light gray drive nut)
- Lead-time risk High
Install tool MP550DN-6AA, proprietary · Exact nose, every brand · Variable stack? Plan grips
| Family | Visu-Lok (Monogram) |
|---|---|
| Head style | Flush head (100° flush head series) (source: Monogram Visu-Lok II brochure, p.7 "Visu-Lok II, 100° flush head series"; p.8 part number code (1 = flush head)) |
| Nominal diameter | 3/16" (-6) |
| Grip | nominal grip .5625" (9/16), grip range .532-.594" (brochure Table 3) |
| Material | Titanium (light gray drive nut). Table 4: nut & screw 6Al-4V titanium, sleeve 303 or 304 CRES |
Decoded from the published numbering scheme; not a claim that this exact dash number is a stocked SKU.
Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers
Series and strength (datasheet)
PLT5 series · e.g. PLT5170-06-05 (100° flush head, titanium) / PLT5270 (hex head, titanium)
Rated 75 KSI (titanium, Monogram catalog chart); "as high as 112 K.S.I. available" (Visu-Lok II brochure p.2); double shear by material on brochure p.4.
Datasheet (PDF) ↗PLT5170 grip chart: 3/16" (-6)
Every catalogued max-grip dash number at this diameter. Stack thickness must fall inside the fastener's grip range: see the design calculators.
Other diameters at this grip:
Threaded / torqued · 4 steps
1/4Inserted, tool placed
“The Visu-Lok II fastener is inserted into the prepared hole. The installation tool is placed over the screw simultaneously engaging the wrench flats and the DRIVE NUT.”
Monogram Visu-Lok II brochure, p.3, How They Work ↗
Drawing traced from: Panel 1.
Source images (3): patent and government drawings
A patent drawing shows the patented design, which can differ in detail from today's catalog part. Each image says why it is tied to this family.
Required tooling, every brand
PLT5170-06-09 (Visu-Lok, 3/16") installs with MP550DN-6AA (MP550 with MPP-08 + MP-06) Standard.
Other tools that work6 process-doc listings
As the fastener's own process document lists them
- MH75DN-6AA (MH75 with MHPDN-01 + MH-06) Standard Monogram PLT5002 Rev N p.10 ↗
- MRT550DN-6AA (MRT550 with MRTP-08 + MRT-6) Right angle Monogram PLT5002 Rev N p.6 ↗
- MRC550DN-6AA (MRC550 with MRCPDN-01 + MRC-06) Close quarter Monogram PLT5002 Rev N p.7 ↗
- MRC250DN-6AA (MRC250 with MRCRPDN-01 + MRHC-6) Close quarter Monogram PLT5002 Rev N p.8 ↗
- MR550DN-6AA (MR550 with MRPDN-1 + MR-6) Right angle Monogram PLT5002 Rev N p.9 ↗
- MHC75BF3-6AA (MHC75A with MHCPDN-01 + MHC-06) Close quarter Monogram PLT5002 Rev N p.11 ↗
Sources7
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.4, Table 1 ↗
- Wrench adapter (turns screw) MP-06; nose adapter (holds nut) MPP-08. A / B / C Ref. 1.37 / 1.25 / 0.56.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.10, Table 7 ↗
- Wrench adapter MH-06; nose adapter MHPDN-01.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.6, Table 3 ↗
- Wrench adapter MRT-6; nose adapter MRTP-08. A / B / C Ref. .56 / .56 / 0.68.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.7, Table 4 ↗
- Wrench adapter MRC-06; nose adapter MRCPDN-01. A / B Ref. .44 / .69.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.8, Table 5 ↗
- Wrench adapter MRHC-6; nose adapter MRCRPDN-01. A Ref. .69.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.9, Table 6 ↗
- Wrench adapter MR-6; nose adapter MRPDN-1. A / B / C Ref. 1.63 / 1.51 / 0.56.
- Monogram PLT5002 Rev N (Visu-Lok II install spec), p.11, Table 8 ↗
- Wrench adapter MHC-06; nose adapter MHCPDN-01.
Diameter -6 (3/16"): decoded from the part number.
Tool catalogs are the manufacturers' as published in the cited edition; confirm current PNs with the tool maker before purchase. Install per the OEM process specification.
Install tooling
Install tooling: MP550DN-6AA (Monogram PLT5002 Rev N (Visu-Lok II install spec), p.4, Table 1) · proprietary
- MGF-06 Flush head round gage (break-off check), PLT 5110, 5150, 5170
Decode details
| Series | Visu-Lok II (Monogram) |
|---|---|
| Decode confidence | high |
| Numbering source | Monogram Visu-Lok II brochure p.7-12 (part number code, Tables 1-4) |
- PLT 5 [head] [material] [shank]-[nominal dia in 1/32" increments]-[grip dash no. in 1/16" increments] (brochure p.8 / p.10).
- "D" dia shank configuration: standard dia.
Government reference cross-reference (DLA FLIS)
PLT5170-06-09 is not listed in FLIS under this exact part number (FLIS data as of 2025-03-18, March 2025 snapshot). FLIS may record it with a material or finish code, or under the standard part number.
Source: DLA PUB LOG ↗. Search any part number in the decoder.
- Visu-Lok by Monogram, hex-drive blind bolt
- Datasheet (PDF) ↗
- Manufacturer page ↗
- Numbering: Monogram Visu-Lok II brochure p.7-12 (part number code, Tables 1-4) ↗
Lead-time risk for this family (SpecLok sourcing assessment): High
Supply signal
Supply signalfor this part number
- Not listed in FLIS under this exact part number (March 2025 snapshot).
- No SpecLok quotes yet.
A signal from records SpecLok holds, not availability, stock or a lead-time promise. FLIS lists who has recorded a part number for the item, not who makes it today. DoD awards carry no NSN or part number, so award activity is for the item name's class.
Sources: DLA FLIS Data Electronic Reading Room (PUB LOG) ↗, DLA PUB LOG ↗, USAspending.gov award search API ↗; DoD award data 2025-10-01 to 2026-07-06; compiled 2026-10-02.
Image credits: Monogram Aerospace Fasteners, Visu-Lok® product page (pennaero.com) ↗. Product images belong to their manufacturers.
Sources
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