The Bolt,shoulder, cataloged under National Stock Number 5306-01-126-1173, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-126-1173 |
| Primary Part Number | 72688-6-35 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.194 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN |
| Fastener Length | 2.664 INCHES MINIMUM AND 2.684 INCHES MAXIMUM IN |
| Shoulder Length | 2.186 INCHES MINIMUM AND 2.192 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.373 INCHES MINIMUM AND 0.374 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.472 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.071 INCHES MINIMUM AND 0.091 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Locking Feature | DETENT RING GRIP |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 108000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.565 INCHES MINIMUM AND 2.597 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| 72688-6-35 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
NSN 5306-01-126-1173 is a Bolt,shoulder, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-126-1173 has 1 manufacturer part number on file: 72688-6-35 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 72688-6-35: Head Height: 0.194 INCHES MINIMUM AND 0.214 INCHES MAXIMUM IN; Fastener Length: 2.664 INCHES MINIMUM AND 2.684 INCHES MAXIMUM IN; Shoulder Length: 2.186 INCHES MINIMUM AND 2.192 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.