The Bolt,shoulder, cataloged under National Stock Number 5306-01-646-1573, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Howmet Global Fastening Systems Inc Div City of Industry Operations (CAGE 1RC86); Lfc Industries, Inc. (CAGE 62384); Saturn Fasteners Inc (CAGE 0K6Z0) |
| Parameter | Value |
|---|---|
| NSN | 5306-01-646-1573 |
| Primary Part Number | JSFB21E4A-8-4U |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| 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 |
|---|---|
| JSFB21E4A-8-4U PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| JSFB21E4A-8-4U PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| JSFB21E4A-8-4U PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| JSFB21E4A-8-4U PRIMARY | Lfc Industries, Inc. (USA) |
| JSFB21E4A-8-4U PRIMARY | Saturn Fasteners Inc (USA) |
| JSFB21E4A-8-4U PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| JSFB21E4A-8-4U PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| JSFB21E4A-8-4U PRIMARY | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| JSFB21E4A-8-4U | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5306-01-646-1573 is a Bolt,shoulder, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-646-1573 has 8 manufacturer part numbers on file: JSFB21E4A-8-4U (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), JSFB21E4A-8-4U (Sps Technologies, Llc Dba PB Fasteners), JSFB21E4A-8-4U (Howmet Global Fastening Systems Inc Div City of Industry Operations), JSFB21E4A-8-4U (Lfc Industries, Inc.), JSFB21E4A-8-4U (Saturn Fasteners Inc) and 3 more.
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.