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Technical Data Sheet
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179972 — FAIRLEAD

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

179972: FAIRLEAD.

The FAIRLEAD is a the manufacturer industrial component. Key specifications include special_features: ANODIZE PER MIL-A-8625,TYPE I,CLASS I, general_characteristics_item_description: ALUMINUM; 1.125 IN. H; OPPOSITE HAND OF THE RIGHT SIDE IN.

This part is cataloged in the U.S. Government catalog under NSN 4820-00-809-8872, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
179972
NSN: 4820-00-809-8872
NIINs: 008098872, 013440239
FSC: 4820 — Valves, Nonpowered
CAGE: 92392 — ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
special_featuresANODIZE PER MIL-A-8625,TYPE I,CLASS I
general_characteristics_item_descriptionALUMINUM; 1.125 IN. H; OPPOSITE HAND OF THE RIGHT SIDE IN
NSN4820-00-809-8872
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 179972 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE SEAT TO DISK END HEIGHT: 0.219 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.103 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.965 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.469 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
UNDER FLANGE HEIGHT: 0.046 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.219 INCHES NOMINAL IN
FLANGE DIAMETER1.103 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.965 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.469 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
UNDER FLANGE HEIGHT0.046 INCHES NOMINAL IN
MATERIALALUMINUM OVERALL
SEAT ANGLE IN DEG0.750 NOMINAL
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 179972?
179972 is a FAIRLEAD.
What is the NSN for 179972?
179972 is cataloged in the U.S. Government catalog under NSN 4820-00-809-8872. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.