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991182 — SPRING,HELICAL,COMPRESSION

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

991182: SPRING,HELICAL,COMPRESSION.

The SPRING,HELICAL,COMPRESSION is a the manufacturer industrial component. Key specifications include special_features: FILTER, MEMBRANE, MONITOR, RESPIRATOR GAS, end_item_identification: FOR USE WITH OXYGEN MONITOR, RESPIRATOR GAS, MODEL 5250, part_name_assigned_by_controlling_agency: FILTER MEMBRANE MONITOR RESPIRATOR GAS. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-460-3815, 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
991182
NSN: 4720-00-460-3815
NIINs: 004603815, 010478347, 014730693
FSC: 4720 — Hose and Flexible Tubing
CAGE: 99343 — CHRYSLER CORP ENGINE AND COMPONENTS SALES DIVERSIFIED PRODUCTS DIV (USA)
SPECIFICATIONS
special_featuresFILTER, MEMBRANE, MONITOR, RESPIRATOR GAS
end_item_identificationFOR USE WITH OXYGEN MONITOR, RESPIRATOR GAS, MODEL 5250
part_name_assigned_by_controlling_agencyFILTER MEMBRANE MONITOR RESPIRATOR GAS
NSN4720-00-460-3815
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 991182 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTER RADIUS: 1.750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: TWO BEND MODIFIED "U"
•
WALL THICKNESS: 0.203 INCHES NOMINAL IN
•
INSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
MATERIAL: RUBBER CHLOROPRENE CLASS CR OVERALL
•
BEND RADIUS: 1.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTER RADIUS1.750 INCHES NOMINAL IN
STYLE DESIGNATORTWO BEND MODIFIED "U"
WALL THICKNESS0.203 INCHES NOMINAL IN
INSIDE DIAMETER1.500 INCHES NOMINAL IN
SPECIAL FEATURESW/STEEL WIRE SPRING INSERT
MATERIALRUBBER CHLOROPRENE CLASS CR OVERALL
MATERIALRUBBER CHLOROPRENE CLASS CR COVER
BEND RADIUS1.750 INCHES NOMINAL IN
SECOND ARM LENGTH2.125 INCHES NOMINAL IN
WORKING LENGTH12.750 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
CH540AReference document
Same NSN cross-reference
Reference document — Secondary reference
20540AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 991182?
991182 is a SPRING,HELICAL,COMPRESSION.
What parts can replace 991182?
There are 2 known substitutes for 991182: CH540A, 20540A. Substitute compatibility should be verified for your specific system.
What is the NSN for 991182?
991182 is cataloged in the U.S. Government catalog under NSN 4720-00-460-3815. 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.