Ø56 mm Instrument End Cap in 7075-T6, Hard Anodized, H7 Spigot

7075-T6 end cap for sealed instrument housings: Ø56 +/-0.05, Ø47 H7 spigot, Ø39.5 -0.015, runout 0.005, 4X M3, 180 grit blast plus hard anodize. Quote in 24 hours.

7075-T6 Hard Anodized End Cap, Ø56 mm with H7 Spigot

Semiconductor & Optics

A precision circular end cap with a sealing spigot and threaded fixings, turned and milled from 7075-T6 with hard anodize on the wear surfaces.

Custom to drawing±0.005 mm standard toleranceQuote in 24 hNo MOQISO 9001 · ISO 13485 · AS9100D

Request a Quote for This Part

Or email drawings to kgl@kglmfc.com

Relevant Capabilities

CNC Turning Surface Treatment/Anodizing

Materials

Aluminum

Key Specifications

Parameter	KGL Capability
Material	Aluminum 7075-T6
Process	CNC turning, CNC milling of threads and features, deburring, 180 grit blast, hard anodize
Critical diameters	Ø56 +/-0.05, Ø47 H7, Ø39.5 -0.015, Ø33 +/-0.05
Heights	29 +/-0.05, 20 -0.010/-0.006
Runout	0.005
Threads	4X M3
Inspection	Dimension, geometric, and appearance; H7 spigot as critical
Tolerance	±0.005 mm standard on metals, engineering plastics, and carbon fiber composite
Certifications	ISO 9001:2015, ISO 13485:2016, AS9100D
Capacity	100+ CNC machines including 11 five-axis centers
MOQ	No MOQ; 1-piece prototypes supported
Quote	Within 24 hours for complete 2D/3D files

About This Part

Sealed instrument end caps live on their spigot: this one runs Ø56 plus or minus 0.05 overall with a Ø47 H7 spigot and Ø39.5 minus 0.015 seat, so the O ring or seal lands exactly where the housing expects it. Circular runout is held at 0.005 and the height steps at 29 plus or minus 0.05 and 20 minus 0.010 minus 0.006.

Four M3 threads close the cap. The finish is 180 grit bead blast plus hard anodize, which is the wear and corrosion pair for instrument exteriors, with the spigot and seat classes protected through treatment.

Unmarked chamfers C0.5, unmarked radii R0.2, unmarked tolerances GB/T 1804 m and geometric GB/T 1184 K. Inspection covers dimension, geometric, and appearance with the spigot class and runout as criticals.

This part family supports the Optical / Semiconductor Parts industry. Read how KGL machines parts for that sector, then send your drawing for a quote.

Why Machine It at KGL

Five-Axis Fleet

100+ CNC machines including 11 five-axis centers run complex geometry in single setups, so tolerances do not stack up across refixturing.

Verified Accuracy

±0.005 mm standard on metals, plastics, and carbon fiber composite, verified on Hexagon and Zeiss CMMs (0.0015 mm accuracy).

Fast Prototypes

Engineering feedback with every quotation; prototype parts typically machined in 15 to 25 days.

One Supplier, End to End

Material sourcing, machining, heat treatment coordination, finishing, CMM inspection and export packaging under one roof.

Part-Specific Advantages

Ø47 H7 spigot with Ø39.5 -0.015 seat for sealed assembly
Circular runout 0.005 on the sealing diameter
Ø56 +/-0.05 overall, height steps 29 +/-0.05 and 20 -0.010/-0.006
180 grit blast plus hard anodize wear finish
4X M3 closure threads

Typical Applications

Sealed housing end caps for precision instruments
Instrument enclosure covers with spigot seals
Wear duty anodized circular covers

Commercial Terms

Commercial	Detail
MOQ	No MOQ; 1-piece prototype supported
Quote	Within 24 hours for complete 2D/3D files
Terms	EXW / FOB Shenzhen
Certifications	ISO 9001:2015
Packaging	Individual bubble wrap, export carton or wooden case
Lead Time	Prototypes 7 to 15 days; production scheduled by volume

Common Questions

Why hard anodize on an end cap?

Caps get handled, bumped, and wiped with solvents. Hard anodize takes that duty and keeps the sealing diameters stable, with controlled fits masked or finished after.

What makes the spigot the critical feature?

The seal and the concentricity of the whole closure stack up from it. Runout 0.005 on that diameter is what keeps the housing sealed and smooth.