The Ring,wearing, cataloged under National Stock Number 4320-00-792-6172, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 23 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-792-6172 |
| Primary Part Number | 99K1 1-2B-P |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Surface Finish | 113.0 MICROINCHES INSIDE |
| Surface Finish | 113.0 MICROINCHES OUTSIDE |
| Surface Finish | 225.0 MICROINCHES LEFT FACE |
| Surface Finish | 225.0 MICROINCHES RIGHT FACE |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Distance Between Flanges | 0.688 INCHES NOMINAL IN |
| Corner Radius | 0.750 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Body Style | INTERNAL FLANGE W/EXTERNAL LOCKING FLANGE |
| Distance From End | 0.396 INCHES NOMINAL IN |
| Body Outside Diameter | 4.119 INCHES MINIMUM AND 4.121 INCHES MAXIMUM IN |
| End to Flange Distance | 0.950 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 2.688 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.248 INCHES NOMINAL IN |
| Distance Below Centerline | 0.125 INCHES NOMINAL IN |
| Body Inside Diameter | 3.233 INCHES MINIMUM AND 3.235 INCHES MAXIMUM IN |
| Right Side Flange Thickness | 0.250 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 2.000 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.312 INCHES NOMINAL IN |
| Largest External Anchor Flange Radius | 2.250 INCHES NOMINAL 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 |
|---|---|
| K1 1-2 B16M | Fairbanks Morse, Llc (USA) |
| 99K1 1-2B-P PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| K1 1-2 B16M | 5/9 Secondary reference Colt Industries Inc Power Systems Div |
| K1 1-2 B16M | 5/9 Secondary reference U.S. Government activity |
| 99K1 1-2B-P | 3/9 Design control — primary reference U.S. Government activity |
| QQ-C-390B | 4/1 Identification reference U.S. Government activity |
NSN 4320-00-792-6172 is a Ring,wearing, manufactured by Fairbanks Morse, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-792-6172 has 2 manufacturer part numbers on file: K1 1-2 B16M (Fairbanks Morse, Llc), 99K1 1-2B-P (Fairbanks Morse, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4320-00-880-8658, 5330-00-939-0464. Verify interchangeability with system specifications before substitution.
Key specifications for 99K1 1-2B-P: Surface Finish: 113.0 MICROINCHES INSIDE; Surface Finish: 113.0 MICROINCHES OUTSIDE; Surface Finish: 225.0 MICROINCHES LEFT FACE; Surface Finish: 225.0 MICROINCHES RIGHT FACE. 23 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.