PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1377AGage,pressure,dial Indicating

Ashcroft Inc Dba Heise · NSN 6685-00-066-1059 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-066-1059 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-066-1059. Primary manufacturer part number: 1377A.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Overall Diameter: 7.562 INCHES NOMINAL IN
  • Mounting Hole Quantity: 3
  • Surface Treatment: PAINT EPOXY CASE
  • Connector Type Vent: NOT PROVIDED
  • Bezel Type: HINGE
  • Mounting Hole Diameter: 0.196 INCHES NOMINAL IN
  • Mounting Method: FLUSH PANEL
Applications
  • Applications requiring Glass Protective Crystal construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-066-1059, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-066-1059
Primary Part Number1377A
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAshcroft Inc Dba Heise
StatusACTIVE
Overall Diameter7.562 INCHES NOMINAL IN
Mounting Hole Quantity3
Surface TreatmentPAINT EPOXY CASE
Connector Type VentNOT PROVIDED
Bezel TypeHINGE
Mounting Hole Diameter0.196 INCHES NOMINAL IN
Mounting MethodFLUSH PANEL
Connection LocationBACK
Scale Accuracy1/2 OF 1 PERCENT RATING ENTIRE RANGE
MaterialGLASS PROTECTIVE CRYSTAL
Connection Size0.250 IN. NPT SIZE IN
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
MaterialBRONZE ACTUATING ELEMENT
Pointer ColorBLACK
Dial Size6 IN. DIA IN
Scale Smallest Increment0.500 POUNDS PER SQUARE INCH (PSI) LBS
Scale NamePRESSURE
Pointer TypeINDICATING
Graduation Unit5.000 POUNDS PER SQUARE INCH LBS
Scale Range+0.000 TO 30.000 POUNDS PER SQUARE INCH LBS
Scale TypeSINGLE
ColorBLACK CASE
AdjustabilityNONADJUSTABLE
Actuation TypeSINGLE BOURDON TUBE
Connection Quantity1
Bolt Circle Diameter7.000 INCHES NOMINAL IN
MaterialIRON CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-00-068-344445-1377AS-02B100 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-108-1108361-509-9006 INTERCHANGEABLE
Gage,pressure,dial Indicating
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
5310-00-251-00881377A INTERCHANGEABLE
Nut,plain,hexagon
Mgm Brakes Inc Div Indian Head Industries Inc
6620-00-459-1622 INTERCHANGEABLE
Gauge,pressure
6685-00-531-340645-1377AS02B160 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-531-3938132550-1903 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-683-95914 1-2 103FMH1-4LBM60 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-783-4827 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-840-3766 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-900-2655451377AS02B 0/15 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
Cross-Reference Index
Part NumberManufacturer
1377A Ashcroft Inc Dba Heise (USA)
Related Parts
6685-00-068-3444INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
45-1377AS-02B100
6685-00-108-1108INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
361-509-9006
5310-00-251-0088INTERCHANGEABLE
NUT,PLAIN,HEXAGON
1377A
6620-00-459-1622INTERCHANGEABLE
GAUGE,PRESSURE
6685-00-531-3406INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
45-1377AS02B160
6685-00-531-3938INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
132550-1903
6685-00-683-9591INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
4 1-2 103FMH1-4LBM60
6685-00-783-4827INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-840-3766INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-900-2655INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
451377AS02B 0/15
6685-00-956-6396INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
60-1082SS-02B-XEY-0/15PSI
3460-01-149-0278INTERCHANGEABLE
WHEEL CONTACT DETECTOR
1377A

Frequently Asked Questions

What is NSN 6685-00-066-1059?

NSN 6685-00-066-1059 is a Gage,pressure,dial Indicating, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-066-1059?

NSN 6685-00-066-1059 has 1 cross-referenced part number: 1377A (Ashcroft Inc Dba Heise).

What NSN replaces 6685-00-066-1059?

There are 12 known substitutes for 6685-00-066-1059: 6685-00-068-3444, 6685-00-108-1108, 5310-00-251-0088 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1377A?

Key specifications for 1377A: Overall Diameter: 7.562 INCHES NOMINAL IN; Mounting Hole Quantity: 3; Surface Treatment: PAINT EPOXY CASE; Connector Type Vent: NOT PROVIDED. 28 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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