The Washer,flat, cataloged under National Stock Number 5310-01-236-1699, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Pentair Pump Group, Inc. Dba Fairbanks Morse Pump. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-236-1699 |
| Primary Part Number | 99K1 1/2B-Q PIECE 9A |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump |
| Status | ACTIVE |
| Overall Diameter | 1.750 INCHES NOMINAL IN |
| Material Document and Classification | ASTM B164 CL A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | NICKEL ALLOY 400 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.931 INCHES MINIMUM AND 0.968 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 |
|---|---|
| 99K1 1/2B-Q PIECE 9A PRIMARY | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump (USA) |
| 11FM1N00167080 | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump (USA) |
NSN 5310-01-236-1699 is a Washer,flat, manufactured by Pentair Pump Group, Inc. Dba Fairbanks Morse Pump, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-236-1699 has 2 manufacturer part numbers on file: 99K1 1/2B-Q PIECE 9A (Pentair Pump Group, Inc. Dba Fairbanks Morse Pump), 11FM1N00167080 (Pentair Pump Group, Inc. Dba Fairbanks Morse Pump).
Key specifications for 99K1 1/2B-Q PIECE 9A: Overall Diameter: 1.750 INCHES NOMINAL IN; Material Document and Classification: ASTM B164 CL A ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 7 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.