The Bolt,shoulder, cataloged under National Stock Number 5306-01-175-3635, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-175-3635 |
| Primary Part Number | VS3251-3-16 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 1.323 INCHES MINIMUM AND 1.353 INCHES MAXIMUM IN |
| Shoulder Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| VS3251-3-16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| PBF1263-3-16 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1065-3-16 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| ST3M494-3-16 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M494-3-16 | 5/9 Secondary reference Sps Technologies Inc |
| 10116101 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M494-3-16 | 3/2 Design control — primary reference U.S. Government activity |
| VS3251-3-16 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-175-3635 is a Bolt,shoulder, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-175-3635 has 3 manufacturer part numbers on file: VS3251-3-16 (Howmet Global Fastening Systems Inc), PBF1263-3-16 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), S11-1065-3-16 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries).
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-594-8030, 9150-01-690-3098. Verify interchangeability with system specifications before substitution.
Key specifications for VS3251-3-16: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 1.323 INCHES MINIMUM AND 1.353 INCHES MAXIMUM IN; Shoulder Length: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.