The Pin-Rivet, cataloged under National Stock Number 5320-01-695-3941, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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 | 5320-01-695-3941 |
| Primary Part Number | HLT631YB-10-21 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Shank Diameter | 0.3020 INCHES MINIMUM AND 0.3060 INCHES MAXIMUM IN |
| Lubrication | SOLID FILM OR DRY FILM |
| Head Height | 0.0658 INCHES MINIMUM AND 0.0679 INCHES MAXIMUM IN |
| Fastener Length | 1.8025 INCHES MINIMUM AND 1.8225 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS2700 METHOD 1 OR 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | PH13-8MO CRES PER AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Specification/standard Data | 76301-ST3-758 MANUFACTURERS STANDARD |
| Grip Length | 1.3075 INCHES MINIMUM AND 1.3175 INCHES MAXIMUM IN |
| Width Between Flats | 0.1270 INCHES MINIMUM AND 0.1295 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.4689 INCHES MINIMUM AND 0.4739 INCHES MAXIMUM IN |
| 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 |
|---|---|
| HLT631YB-10-21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M758D5-21 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HLT631YB-10-21 PRIMARY | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HLT631YB-10-21 | West Coast Aerospace, Inc. (USA) |
| ST3M758D5-21 | Houston Precision Fasteners I Lp (USA) |
| ST3M758D5-21 | The Boeing Company Div Defense (USA) |
| HP4758D5-21 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| HLT631YB-10-21 PRIMARY | Hi-Shear Corporation (USA) |
| HLT631YB-10-21 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M758 | D/9 Drawing number reference only The Boeing Company Div Defense |
| HLT631YB-10-21 | 3/2 Design control — primary reference U.S. Government activity |
| HLT631YB-10-21 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5320-01-695-3941 is a Pin-Rivet, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-695-3941 has 9 manufacturer part numbers on file: HLT631YB-10-21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M758D5-21 (Fastener Innovation Technology, Inc. Dba F I T), HLT631YB-10-21 (Sps Technologies Ltd, Tj Brooks Division), HLT631YB-10-21 (West Coast Aerospace, Inc.), ST3M758D5-21 (Houston Precision Fasteners I Lp) and 4 more.
9 possible matches (shared part number, not a government interchangeability claim): 5320-01-695-4189, 5320-01-719-1660, 5320-01-719-8318. Verify interchangeability with system specifications before substitution.
Key specifications for HLT631YB-10-21: Shank Diameter: 0.3020 INCHES MINIMUM AND 0.3060 INCHES MAXIMUM IN; Lubrication: SOLID FILM OR DRY FILM; Head Height: 0.0658 INCHES MINIMUM AND 0.0679 INCHES MAXIMUM IN; Fastener Length: 1.8025 INCHES MINIMUM AND 1.8225 INCHES MAXIMUM IN. 20 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.