PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 8538 PIECE 20
8538 PIECE 20 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, taper_length: 0.031 INCHES NOMINAL IN, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 1.000 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.250 INCHES NOMINAL IN, style_designator: PLAIN THREADED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-218-8028, 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
8538 PIECE 20
NSN: 4820-01-218-8028
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
taper_length0.031 INCHES NOMINAL IN
thread_class2A SINGLE THREADED PORTION A
thread_length1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.250 INCHES NOMINAL IN
style_designatorPLAIN THREADED
seat_angle_in_deg0.750 NOMINAL
nominal_thread_size1.125 INCHES SINGLE THREADED PORTION IN
body_inside_diameter1.047 INCHES NOMINAL IN
taper_major_diameter1.000 INCHES NOMINAL IN
taper_minor_diameter0.750 INCHES NOMINAL IN
seating_surface_shapeANGULAR
NSN4820-01-218-8028
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8538 PIECE 20 · 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
•
NOMINAL THREAD SIZE: 1.125 INCHES SINGLE THREADED PORTION IN
•
BODY INSIDE DIAMETER: 1.047 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
STYLE DESIGNATOR: PLAIN THREADED
•
MATERIAL: COPPER ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
THREAD LENGTH: 1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE1.125 INCHES SINGLE THREADED PORTION IN
BODY INSIDE DIAMETER1.047 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
STYLE DESIGNATORPLAIN THREADED
MATERIALCOPPER ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
THREAD LENGTH1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
SEAT ANGLE IN DEG0.750 NOMINAL
TAPER LENGTH0.031 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
DKA7410.002.127Interchangeable
interchangeable cross-reference
interchangeable
D-K-A7410-002-127Interchangeable
interchangeable cross-reference
interchangeable
B7410.002.127Interchangeable
interchangeable cross-reference
interchangeable
A7410Interchangeable
interchangeable cross-reference
interchangeable
8503-16Interchangeable
interchangeable cross-reference
interchangeable
8500-16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 8538 PIECE 20?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 8538 PIECE 20?
8538 PIECE 20 is a SEAT,VALVE.
What parts can replace 8538 PIECE 20?
There are 24 known substitutes for 8538 PIECE 20: DKA7410.002.127, D-K-A7410-002-127, B7410.002.127 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8538 PIECE 20?
8538 PIECE 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-218-8028. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 8538 PIECE 20

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026